采矿废石—尾砂混合骨料在下向分层进路胶结充填采矿中应用的试验研究

何建元,李宏业,高谦,尹升华

Experimental Research on Application of Mixed Aggregate of Mining Waste Rock and Tailings in Downward Layered Approach and Cemented Filling Mining Method HE Jianyuan1，LI Hongye1，GAO Qian2，YIN Shenghua2

表7 废石和尾砂配比为5∶5 的充填体抗压强度测试结果

Table 7 Test results of compressive strength for filling body with ratio of waste and tailings is 5∶5

水泥掺量 /（kg·m-3） 料浆质量浓度/% 抗压强度/MPa 3 d 7 d 28 d 260 77 2.2 260 78 2.8 260 79 3.1 260 78 1.6 1.70 3.8 260 79 2.4 3.31 4.2 260 80 2.4 4.05 4.7